Homework Answers
7) It will continue to move until it's acted upon by a force. Correct option - 3rd one
8) If you ignore air resistance, answer is True.
If you take into account the air resistance, the answer is False.
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DQ Question 7 1 pts Suppose an object is moving in a straight line at...
Choose the correct answer Q1: 1. According to Newton's First Law of Motion, A. An object...
Choose the correct answer Q1: 1. According to Newton's First Law of Motion, A. An object at rest eventually begins to move. B. An object in motion moves in a parabolic trajectory unless acted upon by a net force. C. An object at rest always remains at rest. D. An object at rest remains at rest unless acted upon by a net force. 2.A bowling ball and an apple at a height of 30 meters above the ground is falling...
2. A 106-kg object is initially moving in a straight line with a speed of 51.3...
2. A 106-kg object is initially moving in a straight line with a speed of 51.3 m/s. (a) If it is brought to a stop with a decelera- tion of 1.97 m/s2, what force is required, what distance does the object travel, and how much work is done by the force? (b) An- swer the same questions if the object's deceleration is 4.82 m/s?. 3. To push a 25-kg crate up a 27° incline, a worker exerts a force of...
Question 2 According to Newton's Laws of Motion, if I throw a baseball in outer space...
Question 2 According to Newton's Laws of Motion, if I throw a baseball in outer space - far from any other object- how will that ball move over time? (For the sake of this problem, let's neglect my mass) After the force of my hand no longer acts on the ball: Question 2 options: the ball will move forward, but it will gradually slow down and come to a stop once the force of my hand no longer acts on...
5. A car starting from rest moves in a straight line with a constant acceleration of...
5. A car starting from rest moves in a straight line with a constant acceleration of 2.20 m's for 100 s,then slows down to a stop with a constant deceleration of 3.05 m/s. How far does it travel? meters 6. Two cars are traveling along a straight road. Car (A) maintains a constant spoed of 900 kmh: car (B) maintains a constant spoed of 101 km/h. Att0, car (B) is 450 km behind car A. How far will car (A)...
Question 3 10 pts A skater slides at a constant speed in one straight line on...
Question 3 10 pts A skater slides at a constant speed in one straight line on a level track. She then allows herself to coast to a complete stop, which takes 35 m to stop completely. What was her initial velocity? (Use coefficient of kinetic friction = 0.030; g = 9.81 m/s2) O None of the provided answers are correct more information is needed to answer the question 6.2 m/s 7.9 m/s 4.5 m/s 4.8 m/s 2.4 m/s
Part 1 (12 marks): Indicate the answer choice that best completes the statement or answers the...
Part 1 (12 marks): Indicate the answer choice that best completes the statement or answers the question Q1. Which of the following is a scalar quantity? a) weight b) speed c) momentum d) impulse Q2. When you jump on a trampoline straight up you land on the same position. This is because: a) Earth does not move, otherwise the ground will be swept away b) Earth moves very slowly c) your body continues to move with Earth because of its...
1 pts Question 5 5) A ball is launched straight upwards at 11 m/s from the...
1 pts Question 5 5) A ball is launched straight upwards at 11 m/s from the side of a building which is 134 meters above the ground. At the exact same time, a projectile is launched from the ground (the base of the building). The projectile is 39 meters from the base of the building. With what speed does the projectile need to be launched, in m/s, such that the it strikes the other ball, 16 meters above the ground?
Question 2 1 pts Kirk, Spock, and McCoy stand on the top deck of a parking...
Question 2 1 pts Kirk, Spock, and McCoy stand on the top deck of a parking garage on planet Earth, 19 m above the ground below. For reasons that are unknown to us, they simultaneously throw pebbles off the deck, each at the same speed of 15 m/s. Kirk throws his up at an angle of 45 degrees above the horizontal, Spock throws his perfectly horizontally, and McCoy, in a fit of pique, throws his straight down toward the ground....
please help with #7 and question 6 (the last question) 3. Rescale the axes if necessary...
please help with #7 and question 6 (the last question)
3. Rescale the axes if necessary to see all of the graphs. Answer the following questions: a. At the instant the push ends, what does the force equal? F= b. At the instant the push ends, what does the acceleration equal? a= c. At the instant the push ends, what can you say about the speed of the cart? Look carefully at the graphs on the computer monitor. 4. Use...
. Question 9 4 pts Suppose a disk of radius R = 6 cm is rotating...
.
Question 9 4 pts Suppose a disk of radius R = 6 cm is rotating with an angular velocity w = 7 rad/s. What is the speed of a point on the rim of the disk? 200 m/s O 0.84 m/s 14 m/s - 168 m/s O 42 m/s O 0.42 m/s 1.68 m/s 0.06 m/s 0.72 m/s Question 10 4 pts Suppose the angular velocity of a disk of radius R = 6 cm increases uniformly from 14...
Choose the correct answer Q1: 1. According to Newton's First Law of Motion, A. An object at rest eventually begins to move. B. An object in motion moves in a parabolic trajectory unless acted upon by a net force. C. An object at rest always remains at rest. D. An object at rest remains at rest unless acted upon by a net force. 2.A bowling ball and an apple at a height of 30 meters above the ground is falling...
2. A 106-kg object is initially moving in a straight line with a speed of 51.3 m/s. (a) If it is brought to a stop with a decelera- tion of 1.97 m/s2, what force is required, what distance does the object travel, and how much work is done by the force? (b) An- swer the same questions if the object's deceleration is 4.82 m/s?. 3. To push a 25-kg crate up a 27° incline, a worker exerts a force of...
5. A car starting from rest moves in a straight line with a constant acceleration of 2.20 m's for 100 s,then slows down to a stop with a constant deceleration of 3.05 m/s. How far does it travel? meters 6. Two cars are traveling along a straight road. Car (A) maintains a constant spoed of 900 kmh: car (B) maintains a constant spoed of 101 km/h. Att0, car (B) is 450 km behind car A. How far will car (A)...
Question 3 10 pts A skater slides at a constant speed in one straight line on a level track. She then allows herself to coast to a complete stop, which takes 35 m to stop completely. What was her initial velocity? (Use coefficient of kinetic friction = 0.030; g = 9.81 m/s2) O None of the provided answers are correct more information is needed to answer the question 6.2 m/s 7.9 m/s 4.5 m/s 4.8 m/s 2.4 m/s
Part 1 (12 marks): Indicate the answer choice that best completes the statement or answers the question Q1. Which of the following is a scalar quantity? a) weight b) speed c) momentum d) impulse Q2. When you jump on a trampoline straight up you land on the same position. This is because: a) Earth does not move, otherwise the ground will be swept away b) Earth moves very slowly c) your body continues to move with Earth because of its...
1 pts Question 5 5) A ball is launched straight upwards at 11 m/s from the side of a building which is 134 meters above the ground. At the exact same time, a projectile is launched from the ground (the base of the building). The projectile is 39 meters from the base of the building. With what speed does the projectile need to be launched, in m/s, such that the it strikes the other ball, 16 meters above the ground?
Question 2 1 pts Kirk, Spock, and McCoy stand on the top deck of a parking garage on planet Earth, 19 m above the ground below. For reasons that are unknown to us, they simultaneously throw pebbles off the deck, each at the same speed of 15 m/s. Kirk throws his up at an angle of 45 degrees above the horizontal, Spock throws his perfectly horizontally, and McCoy, in a fit of pique, throws his straight down toward the ground....
please help with #7 and question 6 (the last question)
3. Rescale the axes if necessary to see all of the graphs. Answer the following questions: a. At the instant the push ends, what does the force equal? F= b. At the instant the push ends, what does the acceleration equal? a= c. At the instant the push ends, what can you say about the speed of the cart? Look carefully at the graphs on the computer monitor. 4. Use...
.
Question 9 4 pts Suppose a disk of radius R = 6 cm is rotating with an angular velocity w = 7 rad/s. What is the speed of a point on the rim of the disk? 200 m/s O 0.84 m/s 14 m/s - 168 m/s O 42 m/s O 0.42 m/s 1.68 m/s 0.06 m/s 0.72 m/s Question 10 4 pts Suppose the angular velocity of a disk of radius R = 6 cm increases uniformly from 14...
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